9700 Pro max vgpu?

[spaceman]

Hey guys, I spent some time lapping today, and have my Xtreme air-cooling working better than evar. ;) I have the copper base of a HS, drilled and lapped, used as a spacer between an aluminum HS and the core. That's topped off with a 92mm Panaflo. Now I've been going up on the voltage a little at a time, and I'm at 1.9v now. The heatsink isn't even warm to touch. So my question is, how high do you guys with water, pelts etc. take your gpu voltage? I'm thinking about going for more, but I'd like to hear if anyone's ever had serious probs from too much voltage, and how much voltage caused the probs. Thanx. :) BTW, I'm a very impatient person, so I might just keep going till it shuts down, or I can run @ 450 (my long-term goal.) :D ;)

[spaceman]

Never mind, thanx anyways. ;) I took it as high as 1.95v, a little at a time, but nothing past 1.9 did any good. Needed that much to stabilize 436MHz. on the core. I actually ran 3DMark '01@450 once, but then I realized my screen res was set too high(crappy score, so I didn't bother publishing). After I changed it, it wouldn't run through again. :( Had to come back down to 436 to get stable runs. Maybe after some burn in@1.9v, it might go higher? I hope. :rolleyes: ;)

[CATCH22ATPLAY]

Most people started having problems at above 1.75 volts on a R9700Pro. That includes dudes using water blocks etc. I use a socket 370 all copper heatsink and i run usually 1.830 volts. I can however run it at 1.95 or so. My R9800Pro i've run at up to 2.025 volts. I've found for 24/7 use 1.830 for a R9700Pro and 1.950 for a R9800Pro to be the max it can handle when playing an intense game for hours. But for a quickie bench just feel the back side of the core and if it doesn't get hot i say give her all she can handle. Well so long as you don't exceed my maximums. You're actually the first person besides me that's been able to run at 1.90 without a WB or pelt. Your PSU must be a good one or you got lucky. Oh and you got a decent card too. BTW my R9700 hits 450 core with my heatsink and 1.830 volts. I got 2 of em and they both run the exact same. More volts doesn't help. But raising volts and using subzero cooling sure does. :) Problem i believe is the mosfets for the core. I think they're maxxed out. Putting a heatsink/fan on that alum plate will lower thier temps and you can get a couple more watts out of em and maybe 460 core. My plate is removed atm while i do some more experimenting to get past 450-460 core with this type of cooling aka 82f air. OK back to modding. :)

[spaceman]

Well, I feel pretty good now, then, cause even tho I'm not hitting 450 core yet, that tells me I MIGHT have a chance. :banana: Actually, I use 2 PSUs, a PCP&C Turbo-Cool425 runnin the 8RDA+, and a Robanton, :rolleyes: , 600 watt for everything else, including the floppy connector on the 9700. I put a piece of a Thermaltake RAMsink on that aluminum plate a long time ago, but I've never lifted it off yet. I've thought about lifting it, to put a tiny dab of AS3 on the hot items (MOSFETS?). I've always been a bit nervous about that tho, not knowing how things were attached under it & such. ;) BTW, the best thing about this card, is it was a newegg refurb, only cost me $240, when they were still going for about $350. :D

[CATCH22ATPLAY]

Ah excellent. I got a pcp&c psu myself. I had pcp&c's engineer Ted modify it per my specs. Damn thing cost me $325.00. But worth every penny. For a refurb you got one sweetarse deal o/c and price wise. :)

(MOSFETS?) Hell i dunno. mosfet, hexfet, jfet or whatever you wanna call em. I just tried to remove my alum plate from a semi fried R9700 (works but fps are 1/2 normal or less) and it pulled off 2 of them damn mosfets :( Whoa is me. Oh well i guess i'll have to complete my other voltage mod experiments on a good card.

[spaceman]

Dang, that's too bad, that things came off that weren't supposed to. :( I was hopin' you'd find out something good under there. ;) Be carefuller on the good ones, or maybe refrain?

[johnxp]

I run my 9700 with 1.85 volts @ 430mhz stable as a rock.
It's cooled using a very tricked out thermaltake hp cooler, 80 fan on top, 92mm fan on bottom, aluminium hs on the plate, tm bga ramsinks on bottom ram, oversized aluminium heatsinks on the top ram.

I've gone as high as 1.95 volts trying to reach 450mhz. I just didn't see a return from the extra voltage. I believe heat is the culprit. I'm ok with 430mhz :] it's the ram that's bugging me.

My vddq is set to 3.05 with a fixed resistor. I've read not to go over 1.5 for vref, I'm currently at 1.55.

My Vdimm is set to 3.3, this only gets me 325mhz on the ram. If I lower the vdimm at all I get artifacts. If I raise the clock I also get artifacts.

I want to try more vref to meet the 1/2 ratio. But, I'm afraid I'll smoke the card. Is their something I'm missing or does my ram just stink?

8rda+
antec tp550
----
edit- Mine is a revision 3 pcb made by powercolor purchased used.

[CATCH22ATPLAY]

Yes try raising VDD and lowering VDDQ and see what happens. If you get dots the you gotta raise VDD and if you get artifacts that look like tree limbs raise Vref. If screen completely freaks out like a hair dryer is on and your trying to watch tv on an old tube then raise Vref. I've never found raising VDDQ above 2.975 to be of any help. In fact 2.825-2.875 seemed the sweet spot on my cards and Vref at 1.510 max. But yours is a power color so f knows what yours likes or needs. If yours is using a lower amp hexfet then that would explain why it likes higher voltages. It needs that higher voltage to equal amount of watts my card puts out.

Oh more than likely it's either a bad card you got or your psu doesn't put out enough juice. I've had a few bad cards that no matter what just plain sucked even with all my volt mods added and then some. Frankly i don't understand why there would be such a big difference between cards if they use the same parts and i volt mod em to the same volts. But there is a huge difference. Must be that + or - 10% resistors they use and all other associated parts. WHere's QA when you need em.

[NoStra]

Can someone awnser my question about the max memory voltage?

http://www.xtremesystems.org/forums/showthread.php?s=&threadid=18271

[CATCH22ATPLAY]

NoStra
I've tried up to 4.2 :)

That wasn't safe. In fact that was rather crazy. 3.8 worked ok. But i never liked running it for extended periods above 3.4 myself. Using ramsinks and fans blowing on em of course. Do you feel lucky? ;)

[Stang_Man]

Originally posted by CATCH22ATPLAY
NoStra
I've tried up to 4.2 :)

That wasn't safe. In fact that was rather crazy. 3.8 worked ok. But i never liked running it for extended periods above 3.4 myself. Using ramsinks and fans blowing on em of course. Do you feel lucky? ;)

what ohm variable resistor you use for that??

i'm at 3.15v right now with a 10k Ohm variable resistor on the vmem (vdd), set to ~8500 Ohm

[NoStra]

Originally posted by Stang_Man
what ohm variable resistor you use for that??

i'm at 3.15v right now with a 10k Ohm variable resistor on the vmem (vdd), set to ~8500 Ohm

Don't know...I just use a variable resistor and measure with my multimeter the voltage on the card.